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PubMed · 3440954

Sampling problems in twin research.

S Torgersen
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Abstract

Sampling problems related to twin problems may be of at least three kinds: small samples, self-selection and unrepresentative ascertainment. The article mostly discusses the third type of sample problem. Data from a nationwide Norwegian twin study show that the results of twin studies will be quite different depending upon the ascertainment procedure. According to both the ICD-9 as well as the DSM-III classification system, only samples ascertained from mental hospitals treating severe cases are able to demonstrate hereditary factors of any strength.

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Anxiety DisordersDepressive DisorderDiseases in TwinsHumansMental DisordersMood DisordersRisk FactorsSampling StudiesSomatoform DisordersJournal Article

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S Torgersen. 1987. Sampling problems in twin research.. https://doi.org/10.1016/0022-3956(87)90085-9

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